/*
 *  ppui/Graphics_ARGB32.cpp
 *
 *  Copyright 2009 Peter Barth
 *
 *  This file is part of Milkytracker.
 *
 *  Milkytracker is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Milkytracker is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Milkytracker.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "Graphics.h"
#include "Font.h"
#include "fastfill.h"

#define BPP 4

PPGraphics_ARGB32::PPGraphics_ARGB32 (pp_int32 w, pp_int32 h, pp_int32 p, void* buff) :
    PPGraphicsFrameBuffer(w, h, p, buff)
{
}

void PPGraphics_ARGB32::setPixel(pp_int32 x, pp_int32 y)
{
    if (y >= currentClipRect.y1 && y < currentClipRect.y2 &&
        x >= currentClipRect.x1 && x < currentClipRect.x2)
    {

        pp_uint8* buff = (pp_uint8*)buffer + pitch * y + x * BPP;

        buff[1] = (pp_uint8)currentColor.r;
        buff[2] = (pp_uint8)currentColor.g;
        buff[3] = (pp_uint8)currentColor.b;

    }
}

void PPGraphics_ARGB32::setPixel(pp_int32 x, pp_int32 y, const PPColor& color)
{
    if (y >= currentClipRect.y1 && y < currentClipRect.y2 &&
        x >= currentClipRect.x1 && x < currentClipRect.x2)
    {
        pp_uint8* buff = (pp_uint8*)buffer + pitch * y + x * BPP;

        buff[1] = color.r;
        buff[2] = color.g;
        buff[3] = color.b;
    }
}

void PPGraphics_ARGB32::fill(PPRect rect)
{

    if (rect.y1 < currentClipRect.y1)
        rect.y1 = currentClipRect.y1;

    if (rect.x1 < currentClipRect.x1)
        rect.x1 = currentClipRect.x1;

    if (rect.y2 > currentClipRect.y2)
        rect.y2 = currentClipRect.y2;

    if (rect.x2 > currentClipRect.x2)
        rect.x2 = currentClipRect.x2;

    pp_int32 len = (rect.x2 - rect.x1);

    if (len <= 0)
        return;

    pp_uint8 r = (pp_uint8)currentColor.r;
    pp_uint8 g = (pp_uint8)currentColor.g;
    pp_uint8 b = (pp_uint8)currentColor.b;

    #ifdef __ppc__
    pp_uint32 rgb1 =
        (((pp_uint32)r) << 16) +
        (((pp_uint32)g) << 8) +
        (((pp_uint32)b));
    #else
    pp_uint32 rgb1 =
        (((pp_uint32)b) << 24) +
        (((pp_uint32)g) << 16) +
        (((pp_uint32)r) << 8);
    #endif
    pp_int32 inc = (pitch - len * BPP) / BPP;

    pp_uint8* buff = (pp_uint8*)buffer + (pitch * rect.y1 + rect.x1 * BPP);
    pp_uint32* ptr = reinterpret_cast<pp_uint32*>(buff);

    for (pp_int32 y = rect.y1; y < rect.y2; y++)
    {
        fill_dword(ptr, rgb1, len);
        ptr += len;
        ptr += inc;
    }

}

void PPGraphics_ARGB32::fill()
{
    fill(currentClipRect);
}

void PPGraphics_ARGB32::drawHLine(pp_int32 x1, pp_int32 x2, pp_int32 y)
{

    pp_int32 lx = x1;
    pp_int32 rx = x2;

    if (x1 > x2)
    {
        pp_int32 h = x2;
        x2 = x1;
        x1 = h;
    }

    if (lx < currentClipRect.x1)
        lx = currentClipRect.x1;

    if (rx > currentClipRect.x2)
        rx = currentClipRect.x2;

    if (y < currentClipRect.y1)
        return;

    if (y >= currentClipRect.y2)
        return;

    if (lx > currentClipRect.x2)
        return;

    if (rx < currentClipRect.x1)
        return;

    pp_int32 len = (rx - lx);

    if (len <= 0)
        return;

    pp_uint8* buff = (pp_uint8*)buffer + pitch * y + lx * 4;

    #ifdef __ppc__
    pp_uint32 rgb1 = (((pp_uint32)currentColor.r) << 16) +
                     (((pp_uint32)currentColor.g) << 8) +
                     (((pp_uint32)currentColor.b));
    #else
    pp_uint32 rgb1 = (((pp_uint32)currentColor.b) << 24) +
                     (((pp_uint32)currentColor.g) << 16) +
                     (((pp_uint32)currentColor.r) << 8);
    #endif

    fill_dword(reinterpret_cast<pp_uint32*>(buff), rgb1, len);
}

void PPGraphics_ARGB32::drawVLine(pp_int32 y1, pp_int32 y2, pp_int32 x)
{

    pp_int32 ly = y1;
    pp_int32 ry = y2;

    if (y1 > y2)
    {
        pp_int32 h = y2;
        y2 = y1;
        y1 = h;
    }

    if (ly < currentClipRect.y1)
        ly = currentClipRect.y1;

    if (ry > currentClipRect.y2)
        ry = currentClipRect.y2;

    if (x < currentClipRect.x1)
        return;

    if (x >= currentClipRect.x2)
        return;

    pp_int32 len = (ry - ly);

    if (len <= 0)
        return;

    pp_uint8* buff = (pp_uint8*)buffer + pitch * (ly) + x * 4;

    #ifdef __ppc__
    pp_uint32 rgb1 = (((pp_uint32)currentColor.r) << 16) +
                     (((pp_uint32)currentColor.g) << 8) +
                     (((pp_uint32)currentColor.b));
    #else
    pp_uint32 rgb1 = (((pp_uint32)currentColor.b) << 24) +
                     (((pp_uint32)currentColor.g) << 16) +
                     (((pp_uint32)currentColor.r) << 8);
    #endif

    fill_dword_vertical(reinterpret_cast<pp_uint32*>(buff), rgb1, len, pitch);
}

void PPGraphics_ARGB32::drawLine(pp_int32 x1, pp_int32 y1, pp_int32 x2, pp_int32 y2)
{
    __PPGRAPHICSLINETEMPLATE
}

void PPGraphics_ARGB32::drawAntialiasedLine(pp_int32 x1, pp_int32 y1, pp_int32 x2, pp_int32 y2)
{
    __PPGRAPHICSAALINETEMPLATE
}

void PPGraphics_ARGB32::blit(const pp_uint8* src, const PPPoint& p, const PPSize& size, pp_uint32 pitch, pp_uint32 bpp, pp_int32 intensity /* = 256*/)
{
    pp_int32 w = size.width;
    pp_int32 h = size.height;

    pp_uint8* dst = (pp_uint8*)buffer + (this->pitch * p.y + p.x * BPP);

    const pp_uint32 bytesPerPixel = bpp;

    if (intensity != 256)
    {
        for (pp_int32 y = 0; y < h; y++)
        {
            for (pp_int32 x = 0; x < w; x++)
            {
                dst[1] = (src[0] * intensity) >> 8;
                dst[2] = (src[1] * intensity) >> 8;
                dst[3] = (src[2] * intensity) >> 8;
                dst += BPP;
                src += bytesPerPixel;
            }
            dst += this->pitch - w * BPP;
            src += pitch - w * bytesPerPixel;
        }
    }
    else
    {
        for (pp_int32 y = 0; y < h; y++)
        {
            for (pp_int32 x = 0; x < w; x++)
            {
                dst[1] = src[0];
                dst[2] = src[1];
                dst[3] = src[2];
                dst += BPP;
                src += bytesPerPixel;
            }
            dst += this->pitch - w * BPP;
            src += pitch - w * bytesPerPixel;
        }
    }
}


void PPGraphics_ARGB32::drawChar(pp_uint8 chr, pp_int32 x, pp_int32 y, bool underlined /* = false*/)
{

    if (currentFont == NULL)
        return;

    const pp_int32 charWidth = (signed)currentFont->getCharWidth();
    const pp_int32 charHeight = (signed)currentFont->getCharHeight();

    if (x + (signed)charWidth < currentClipRect.x1 ||
        x > currentClipRect.x2 ||
        y + (signed)charHeight < currentClipRect.y1 ||
        y > currentClipRect.y2)
        return;

    const pp_int32 charDim = currentFont->charDim;

    pp_uint8 r = (pp_uint8)currentColor.r;
    pp_uint8 g = (pp_uint8)currentColor.g;
    pp_uint8 b = (pp_uint8)currentColor.b;

    Bitstream* bitstream = currentFont->bitstream;
    pp_uint8* fontbuffer = bitstream->buffer;

    #ifdef __ppc__
    pp_uint32 rgb1 = (((pp_uint32)r) << 16) +
                     (((pp_uint32)g) << 8) +
                     (((pp_uint32)b));
    #else
    pp_uint32 rgb1 = (((pp_uint32)b) << 24) +
                     (((pp_uint32)g) << 16) +
                     (((pp_uint32)r) << 8);
    #endif

    const pp_uint32 cchrDim = chr * charDim;

    if (x >= currentClipRect.x1 && x + charWidth < currentClipRect.x2 &&
        y >= currentClipRect.y1 && y + charHeight < currentClipRect.y2)
    {
        pp_uint8* buff = (pp_uint8*)buffer + y * pitch + x * BPP;

        pp_uint32 yChr = cchrDim;
        for (pp_uint32 i = 0; i < (unsigned)charHeight; i++)
        {
            pp_uint32 xChr = yChr;
            for (pp_uint32 j = 0; j < (unsigned)charWidth; j++)
            {
                if ((fontbuffer[xChr >> 3] >> (xChr & 7) & 1))
                {
                    *reinterpret_cast<pp_uint32*>(buff) = rgb1;
                }
                buff += BPP;
                xChr++;
            }
            buff += pitch - (charWidth * BPP);
            yChr += charWidth;
        }
    }
    else
    {
        pp_uint32 yChr = cchrDim;
        for (pp_int32 i = 0; i < charHeight; i++)
        {
            pp_uint32 xChr = yChr;
            for (pp_int32 j = 0; j < charWidth; j++)
            {

                if (y + (signed)i >= currentClipRect.y1 && y + (signed)i < currentClipRect.y2 &&
                    x + (signed)j >= currentClipRect.x1 && x + (signed)j < currentClipRect.x2 &&
                    (fontbuffer[xChr >> 3] >> (xChr & 7) & 1))
                {

                    pp_uint8* buff = (pp_uint8*)buffer + ((y + i) * pitch + (x + j) * BPP);

                    *reinterpret_cast<pp_uint32*>(buff) = rgb1;
                }
                xChr++;

            }
            yChr += charWidth;
        }

    }

    if (underlined)
        drawHLine(x, x + charWidth, y + charHeight);
}

void PPGraphics_ARGB32::drawString(const char* str, pp_int32 x, pp_int32 y, bool underlined /* = false*/)
{
    if (currentFont == NULL)
        return;

    const pp_int32 charWidth = (signed)currentFont->getCharWidth();
    const pp_int32 charHeight = (signed)currentFont->getCharHeight();

    pp_int32 sx = x;

    while (*str)
    {
        switch (*str)
        {
            case '\xf4':
                setPixel(x + (charWidth >> 1), y + (charHeight >> 1));
                break;
            case '\n':
                y += charHeight;
                x = sx - charWidth;
                break;
            default:
                drawChar(*str, x, y, underlined);
        }
        x += charWidth;
        str++;
    }
}

void PPGraphics_ARGB32::drawStringVertical(const char* str, pp_int32 x, pp_int32 y, bool underlined /* = false*/)
{
    if (currentFont == NULL)
        return;

    const pp_int32 charWidth = (signed)currentFont->getCharWidth();
    const pp_int32 charHeight = (signed)currentFont->getCharHeight();

    while (*str)
    {
        switch (*str)
        {
            case '\xf4':
                setPixel(x + (charWidth >> 1), y + (charHeight >> 1));
                break;
            default:
                drawChar(*str, x, y, underlined);
        }
        y += charHeight;
        str++;
    }
}